Transcription of Chapter 10 WAVE MOTION - Polytechnic School
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Chapter 10 WAVE MOTION - Polytechnic School
Chapter 10--Wave Motion341direction of wave motionplane waves (viewed from above)wave crests moving outward from wave sourceFIGURE of water wavesdirection of wave motionChapter 10 WAVE MOTIONA.) Characteristics of waves :1.) A wave is a disturbance that moves through a ) Example: A pebble is dropped into a quiet pond. The DISTUR-BANCE made by the pebble is what moves outward over the water'sonce-still surface. Water molecules are certainly jostled by the wave, butafter the wave passes by, each molecule finds itself back in its original,pre-disturbance position (at least to a good approximation).In other words, water waves are not made up of lumps of water thatmove across the water's surface. They are disturbances that move throughthe water that only temporarily displace water molecules in the 1: A group of waves is called a wave 2: Looking down from above, pebble-produced water waves will looklike a series of crests and troughs moving in ever-expanding circles outward awayfrom the pebble's point-of-entry into the water.
Chapter 10--Wave Motion 345 crest to crest trough to trough any point to where that point repeats itself node anti-node FIGURE 10.5 a.) Wave-length (λ in me-ters): the dis-tance between two successive crests, or two successive troughs, or be-tween two suc-cessive positions along the wave that are exact duplicates of one another (see Figure 10 ...
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